docker-compose nginx 向 php-fpm 返回 502答案

【问题标题】：docker-compose nginx return 502 to php-fpmdocker-compose nginx 向 php-fpm 返回 502
【发布时间】：2020-12-15 11:16:57
【问题描述】：

请帮助我。有一个错误，一个小错误。也许我只是没有看到它，但我不知道。问题的本质：我正在搭建一个docker环境。带来了nginx，fpm。 url获取php文件时，nginx返回502。

结构：

/www
 /app
   /index.php
   /index.html
 /data
   /db
 /etc
   /nginx
      default.conf
   /php
      php.ini
      php-fpm.conf

撰写 + 环境：

version: '3.5'
services:
    nginx:
        image: nginx:alpine
        volumes:
            - "./etc/nginx/default.conf:/etc/nginx/conf.d/default.conf"
            - "./etc/ssl:/etc/ssl"
            - "./app:/var/www/html"
            - "./etc/nginx/default.template.conf:/etc/nginx/conf.d/default.template"
        ports:
            - "80:80"
        environment:
            - NGINX_HOST=${NGINX_HOST}
        command: /bin/sh -c "envsubst '$$NGINX_HOST' < /etc/nginx/conf.d/default.template > /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'"
        restart: always
        depends_on:
            - php
            - mysqldb
            - memcached
        networks:
            - app
    php:
        image: php:${PHP_VERSION}-fpm
        restart: always
        volumes:
            - "./etc/php/php.ini:/usr/local/etc/php/conf.d/php.ini"
            - "./etc/php/php-fpm.conf:/usr/local/etc/php-fpm.conf"
            - "./app:/var/www/html"
        networks:
            - app
        ports:
            - "9000:9000"
        networks:
            - app
    mysqldb:
        image: mysql:${MYSQL_VERSION}
        container_name: ${MYSQL_HOST}
        restart: always
        env_file:
            - ".env"
        environment:
            - MYSQL_DATABASE=${MYSQL_DATABASE}
            - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
            - MYSQL_USER=${MYSQL_USER}
            - MYSQL_PASSWORD=${MYSQL_PASSWORD}
        ports:
            - "3306:3306"
        volumes:
            - "./data/db/mysql:/var/lib/mysql"
        networks:
            - app
    memcached:
        image: memcached:${MEMCACHED_VERSION}
        container_name: ${MEMCACHED_HOST}
        ports:
            - "11211:11211"
        networks:
            - app
networks:
    app:
        driver: bridge

#!/usr/bin/env bash

# See https://docs.docker.com/compose/environment-variables/#the-env-file

# Nginx
NGINX_HOST=localhost

# PHP

PHP_VERSION=5.4

# MySQL
MYSQL_VERSION=5.7.22
MYSQL_HOST=mysql
MYSQL_DATABASE=test
MYSQL_ROOT_USER=root
MYSQL_ROOT_PASSWORD=root
MYSQL_USER=dev
MYSQL_PASSWORD=dev

# Memcached
MEMCACHED_VERSION=latest
MEMCACHED_HOST=memcached

Nginx [/etc/nginx/default.conf]：

upstream phpserver {
    server php:9000;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name localhost;

    index index.php index.html;
    error_log  /var/log/nginx/error.log;
    access_log /var/log/nginx/access.log;
    root /var/www/html;

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_pass phpserver;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }
}

PHP [php-fpm.conf]:

[global]

error_log = /proc/self/fd/2
daemonize = no

[www]

; if we send this to /proc/self/fd/1, it never appears
access.log = /proc/self/fd/2

user = www-data
group = www-data

listen = 9000

pm = dynamic
pm.max_children = 5
pm.start_servers = 2
pm.min_spare_servers = 1
pm.max_spare_servers = 3

clear_env = no

; Ensure worker stdout and stderr are sent to the main error log.
catch_workers_output = yes

PHP [php.ini] - 默认为 ini 文件。 5.4.它不包括用户、会话前的目录等。这样的结构。更多... phpv 应该就是这个 (5,4)。

我采取了哪些步骤来找到我的错误，但没有找到：

curl localhost:80/index.html >> HELLO_WORLD

curl localhost:80/index.php >> 502 nginx

netstat -an |grep 9000 >> tcp6 0 0 :::9000 :::* LISTEN

curl localhost:80/index.php + docker-compose 日志 >> nginx_1 | 2020/08/26 16:16:09 [error] 7#7: *3 connect() failed (113: Host is unreachable) while connecting to upstream, client: 172.26.0.1, server: localhost, request: "GET /index.php HTTP/1.1", upstream: "fastcgi://172.26.0.2:9000", host: "localhost" nginx_1 | 172.26.0.1 - - [26/Aug/2020:16:16:09 +0000] "GET /index.php HTTP/1.1" 502 157 "-" "curl/7.61.1" nginx_1 | 2020/08/26 16:16:09 [info] 7#7: *3 client 172.26.0.1 closed keepalive connection

php 容器 root@..:/var/www/html# php index.html *>>* HELLO_WORLD root@..:/var/www/html# php index.php *>>* HELLO_WORLD

php 容器 >> root@..:/var/www/html# ls -ll total 13 -rwxrwxrwx. 1 root root 8518 Aug 14 11:36 index.php -rwxrwxrwx. 1 root root 34 Aug 25 21:04 index.html

error_log /var/log/nginx/error.log 调试； >> 猫 /var/log/nginx/error.log - 空

结构 www/ - root:root

很抱歉浪费了时间。请帮我。谢谢！

【问题讨论】：

container_name for php 容器有问题吗？..
是的，它不能解决容器问题
docker-compose 本身会不会有问题？我从源代码安装 [docker-nginx-php-mysql]github.com/nanoninja/docker-nginx-php-mysql，我在 php 容器上得到了同样的错误。

标签： php docker nginx docker-compose fpm

【解决方案1】：

我已经解决了这个问题。我不想分阶段写，但我会简而言之。问题是由于我的操作系统构建是 centos 8 造成的。首先，容器的不正确行为将显示使用 Dockerfile，将识别 repo 的问题。这些问题是可以解决的，但是对我来说变成了触发器，说明我的环境不正确。然后我按照 Centos 8 下的安装说明为 docker 安装了所有软件包。

& 见 https://computingforgeeks.com/install-docker-and-docker-compose-on-rhel-8-centos-8/

【讨论】：